From a1f23bbccd987e30797ee0c87550d37c66d44e9b Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 4 May 2005 09:11:32 +0000
Subject: [PATCH] Fixed bug where the Optimizer::StateVisitor was trying to
 optimize non existant StateSet's.

---
 src/osgUtil/Optimizer.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/osgUtil/Optimizer.cpp b/src/osgUtil/Optimizer.cpp
index e38324b57..208c23cfe 100644
--- a/src/osgUtil/Optimizer.cpp
+++ b/src/osgUtil/Optimizer.cpp
@@ -507,6 +507,7 @@ void Optimizer::StateVisitor::optimize()
     
     // duplicate state attributes removed.
     // now need to look at duplicate state sets.
+    if (_statesets.size()>=2)
     {
         // create the list of stateset's.
         typedef std::vector<osg::StateSet*> StateSetSortList;